body {
    width: 100%;
    max-width: 640px;
    min-width: 320px;
    margin: 0 auto;
    font-size: 14px;
    font-family: -apple-system,Helvetica, sans-serif;
    color: #666666;
    line-height: 1.5;
}
ul{
    margin:0;
    padding: 0;
    list-style: none;
}
p {
    margin: 0;
    padding: 0;
}
a {
    text-decoration: none;
    color: #666666;
}
img {
    vertical-align: middle;
}
.app {
    height: 45px;

}
.app ul li {
    float: left;
    height: 45px;
    background-color: #333333;
    text-align: center;
    line-height: 45px;
    color: #ffffff;
}
.app ul li:nth-child(1) {
    width: 8%;
}
.app ul li:nth-child(1) img {
    height: 10px;
    width: 10px;

}
.app ul li:nth-child(2) {
    width:10%;

}
.app ul li:nth-child(2) img {
    width: 30px;
    height: 30px;
    vertical-align: middle;
}
.app ul li:nth-child(3) {
    width: 57%;
}
.app ul li:nth-child(4) {
    width: 25%;
    background-color: #f63515;
}
.search-wrap {
    height: 44px;
    width: 100%;
    min-width: 320px;
    max-width: 640px;
    position: fixed;
    overflow: hidden;
}
.search-btn {
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 44px;
}
.search-btn::before {
    content: '';
    display: block;
    width: 20px;
    height: 18px;
    background: url("../images/s-btn.png");
    background-size: 20px 18px;
    margin: 14px 0 0 15px;
}
.search-login {
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 44px;
    text-align: left;
    line-height: 44px;
    color: #ffffff;
}
.search {
    position: relative;
    margin-top: 7px;
    height: 30px;
    margin-left: 50px;
    margin-right: 50px;
    border-radius: 15px;
    background-color: white;
}
.jg-icon {
    width: 20px;
    height: 15px;
    position: absolute;
    top: 8px;
    left: 13px;
    background: url("../images/jd.png");
    background-size: 20px 15px;
}
.jg-icon::after{
    position: absolute;
    right: -8px;
    content: '';
    display: block;
    width: 1px;
    height: 15px;
    background-color: #CCCCCC;
}
.sou {
    position: absolute;
    top: 8px;
    left: 50px;
    width: 18px;
    height: 15px;
    background: url("../images/jd-sprites.png") no-repeat -81px 0;
    background-size: 200px auto;
}
.slider img {
    width: 100%;
}
.brand {
    overflow: hidden;
    border-radius: 10px 10px 0 0;
}
.brand div {
    float: left;
    width: 33.33%;
}
.brand div img {
    width: 100%;
}
nav a {

    float: left;
    width: 20%;
    text-align: center;
}
nav a img {
    width: 40px;
    margin: 10px 0;
}
.news {
    margin-top: 20px;
}
.news a {
    box-sizing: border-box;
    float: left;
}
.news img {
    width: 100%;
}
.news a:nth-child(1) {
    width: 50%;
}
.news a:nth-child(n+2) {
    width: 25%;
    border-left: 1px solid #CCCCCC;
}

